Multiply it out to get 5/7*1/9=5/63. This is an exact value of the product.
Suppose one bus travels at x km/h, the second bus is 17 km/h slower so it is x-17
the first bus travels a total of 7x km, the second bus travels 7(x-17)km, together they travel the total distance of 1631 km
7x + 7(x-17) =1631
7x + 7x -119 =1631
14x=1750
x=125
x-17=108
For
, on the left we have
, and on the right,

(where we use the double angle identity:
)
Suppose the relation holds for
:

Then for
, the left side is

So we want to show that

On the left side, we can combine the fractions:

Recall that

so that we can write




(another double angle identity:
)
Then recall that

which lets us consolidate the numerator to get what we wanted:

and the identity is established.
The unit price is $7.89
you divide $23.67 by 3
Answer:

In interval notation: (-12,3)
Step-by-step explanation:
To solve the expression shown in the problem you must:
- Subtract 36 from both sides, then:

- Now you must find two number whose sum is 9 and whose produt is 36. These would be -3 and 12. Then, you have:

- Therefore the result is:

In interval notation:
(-12,3)